Locomotive stoker



March 17, 1936. J. w MYERS 2,034,591

. LOCOMOTIVE STOKER Filed Sept. 8, 1951 I willy HM Patented Mar. 17, 1936 LOCOMOTIVE STOKER John W. Myers, Roanoke, Va., assignor to The Standard Stoker Company, Incorporated, New

York, N. Y., a corporation of Delaware Application September 8, 1931, Serial No. 561,714

18 Claims.

This invention relates to improvements in distributing mechanism for blast-feed stokers and primarily has for its object to provide means whereby certain parts of the mechanism will be protected from the intense heat of the fire, thereby increasing the life' and decreasing the frequent renewal of parts, due to the deterioration resulting from constant heat.

I am aware that many and various types and combinations of distributors have been designed, but undesirable results are obtained due to the renewal of parts subjected to the intense heat of the firebox.

Therefore, my present invention has for a more detailed object, the preserving of the support for the distributing table, which results in more efiicient and economic use.

With the above and other objects in View that will hereinafter appear, the invention further re- 2 sides in the novel details of construction, combination and arrangement of parts, all of which will be first fully described and then be particularly pointed out in the appended claims, reference being had to the accompanying drawing, in Which:-

Figure 1 is a side view partly in elevation and partly in section of the stoker and associated backhead of a locomotive firebox.

Figure 2 is a front elevation of the structure shown in Fig. 1, showing the distributing table and blast chamber.

Figure 3 is a. top plan view of the blast chamber and distributing table.

Figure 4 is a, vertical section taken on the line 44 of Figure 3.

Figure 5 is an enlarged fragmentary sectional view showing more clearly the relation of the distributing table to the support as shown in Figure 1.

Although the two part distributor member may be used with a variety of furnaces, it is especially adapted for use in connection with the backhead 5, of a locomotive comprising sheets 6 and I, which are bent inwardly and rearwardly, respectively, forming the opening 8 in the backhead for the firebox to receive the stoker mechanism.

Numeral 9, denotes a portion of a fuel conduit which may be rigidly or flexibly attached to the backhead of the firebox and of course, is associated with and delivers the fuel to the aperture '8, in the backhead. Associated with the under side of the upper end portion of the bottom wall of the conduit 9, is the blast chamber H], which projects into the lower portion of aperture 8, the blast chamber being secured to the conduit by bolts as denoted by numeral II.

It will be noted that the bolts II, are inserted from the conduit passage side through the bottom wall of the conduit and screwed into the blast chamber, thus drawing the blast chamber tightly to the conduit Wall. struction and applying the blast chamber.

It will also be observed that in this coneasy access is attained for removing The forward vertical wall 21 of the blast chamber is provided with a series of orifices [2, which communicate with chambers l3, which in turn, communicate with supply pipes I 4, the supply pipes being equipped with regulating valves l5. Fluid pressure such as steam is generally employed in stokers of this type for scattering the fuel over the grate area. At its forwardmost portion, the arcuate vertical wall 21 is spaced forward of the discharge end of the conduit 9 and is below the upper edge of the bottom wall of this conduit.

An inclined wall 28 extends upwardly from the vertical wall 27 and meets the edge of the bottom wall of the conduit 9 to form, By this construction, the fuel in efiect, a spillway. which is discharged from the conduit 9 tumbles downwardly over this spillway which serves to break up the mass formation of the fuel before it drops onto the table IT. This permits the coal to spread laterally in equal proportions and thereby a more even distribution of the fuel is accomplished.

Projecting inwardly from the bottom side of the blast chamber I 0, is a support ledge I 6, which may be integral with, or

removably attached thereto.

The distributing table I1, is adapted to be held in position on the support ledge l6, which is apertured as at 29 to receive the downwardly projecting lug I9, on the bottom side of the distribut- The underside of the table I1,

is provided with a rib as at 2|, which strengthens and prolongs the life of the table.

The table I7, is also member as shown at 22.

provided with another The member 22, projects downwardly and rearwardly from the underside of the distributing shaped and partially surrounds table I1, is arcuatelythe support l6,

protecting it from the intense heat of the-firebox;

It is a known fact that where these supports are subjected to the intense heat of the fire that a rapid deteriorating effect takes place, requiring frequent renewals, which results in undesirable waste.

The rearward top portion of the distributing table I1, is beveled as at 23; also the lug I9, is beveled on its forward side as at 24. When applying the table the lips l8 are first placed under the lower edge of the blast chamber In. This necessitates raising the forward portion of the table, so that lug 19, on the bottom of the table will enter the aperture 20 in the support H5. The beveled edges 23 and 24 permit the table to take its substantially horizontal position and once in place lost motion is practically eliminated due to the upper portion of lug I9, practically filling the aperture 20, and the back edge of the table I! being arcuatelyshaped so as to fit around the arcuately-shaped forward vertical wall 2? of the blast chamber Ill.

The distributing table is provided with laterally extending ears 25, which extend a greater distance laterally than the forward portion of the table or any portion of the plate in advance of the ears. The top side of the: table 51, is also provided with diverging side grooves 26, which deflect the fuel to the back corners of the firebox. The ears 25 form a minature table for supporting the fuel for distribution to the sides of the firebox.

It will be understood that throughout the description and claims, the words front and rear and similar terms are to be interpreted in respect to the direction in which fuel passes across the fuel distributing means, that is, the portion thereof from which the fuel leaves the distributing means is the forward or front portion while that portion thereof to which fuel is delivered is the rearward or rear portion.

From the foregoing description, taken in connection with the accompanying drawing, it is thought that the novel details of construction and the advantages of my invention will be readily apparent to those skilled in the art to which it relates.

I claim:

1. In a stoker, a fuel distributing member comprising in combination, a substantially horizontal table over which fuel may be impelled, a blast chamber rearward of said table for impelling the fuel therefrom, said blast chamber having means underlying said table for restraining downward movement of the same, said blast chamber and said table each being provided with one element of an interlocking means cooperating to detachably connect said table to said blast chamber, said interlocking means being arranged with no part thereof protruding above the fuel receiving surface of said table and lips extending rearwardly from said table, said lips engaging the underside of said blast chamber.

2. In a stoker, a fuel distributing member comprising in combination, a blast chamber, a distributing table; said blast chamber having a forward extension underlying said table for restraining downward movement of the same, said blast chamber and table each being provided with one element of an interlocking means cooperating to detachably connect said table with said blast chamber, said interlocking means being arranged with no part thereof protruding above the fuel receiving surface of said table and including a lug on the underside of said table, and an aperture in said extension for receiving said lug, and lips extending rearwardly from said table, said lips engaging the underside of said chamber.

3. In a stoker, a fuel distributing member comprising in combination, a blast chamber provided with a substantially vertical forward wall, and a distributing table associated with said chamber and extending forwardly therefrom, said blast chamber having means underlying said table for restraining downward movement of the same, said blast chamber and said table each being provided with one element of an interlocking means cooperating to detachably connect said table with said blast chamber, said interlocking means being arranged with no part thereof protruding above the fuel receiving surface of said table, the rear end of said table adjacent said wall being beveled to permit angular adjustment thereof when locating said table in operative position with said blast chamber.

4. In a stoker, a fuel distributing member comprising in combination, a blast chamber and a distributing table extending forwardly from said blast chamber, said blast chamber and said table each being provided with one element of an interlocking means cooperating to detachably connect said table with said blast chamber, and an arcuately-shaped transversely extending wall projecting downwardly and rearwardly from the bottom of said table partially surrounding said interlocking means at the forward end thereof.

5. In a stoker, a two part distributing member comprising a front section and a rear section, a support extending forwardly from said rear section under said front section for restraining downward movement of the same, a lug projecting downwardly from said front section, said support having an aperture receiving said lug, the front portion of said lug being tapered to permit the application of said front section from an inclined to a substantially horizontal position, said lug substantially filling said aperture at its top when said front section is in operative position, and a lip carried by said front section extending rearwardly underneath and engaging said rear section.

6. In a stoker a two part fuel distributing member comprising a front section and a rear section, said rear section having a ledge extending forwardly therefrom beneath said front section and arranged to form a support for said front section, and a transversely extending arcuate shaped imperforate wall depending from the underside of said front section, said wall extending downwardly from a position forward of said ledge and rearwardly to a position beneath said ledge.

7. In a stoker a two part fuel distributing member comprising in combination a front section and a rear section, said front and rear sections each being provided with one element of an interlocking means cooperating to detachably connect said front section and said rear section, and a transversely extending arcuate shaped imperforate Wall projecting downwardly and rearwardly from the underside of said front section partially surrounding said interlocking means.

8. In a stoker a two part fuel distributing member comprising in combination a blast chamber and a substantially horizontal table extending forwardly therefrom, said chamber and table each being provided with one element of an interlocking means cooperating to detachably connect said front section with said rear section and a transversely extending arcuate shaped imperforate wall projecting downwardly and rearwardly from the underside of said front section partially surrounding said interlocking means.

9. In a stoker a two part fuel distributing system comprising in combination a front section and a rear section, a support ledge extending forwardly from said rear section and underlying said front section for restraining downward movement of the same, the contiguous surfaces of said support ledge and said front section each being provided with one element of an interlocking means cooperating to detachably connect said front section with said rear section and a transversely extending arcuate shaped imperforate wall projecting downwardly and rearwardly from the underside of said front section partially surrounding said interlocking means.

10. In a stoker a two part fuel distributing system comprising in combination a front section and a rear section, a support ledge extending forwardly from said rear section and underlying said front section for supporting the same, a lug depending from the underside of said front section and engaging said support ledge to form an interlocking means for detachably connecting said front section with said rear section, a lip extending rearwardly from said front section and engaging the underside of said rear section, and a wall extending downwardly and rearwardly from the underside of said front section partially surrounding said interlocking means.

ll. In an interlocked two part fuel distributing member, a table comprising a horizontal top wall, the underside of said top wall adjacent one end thereof being provided with one element of an interlocking means, and a transversely extending arcuate shaped wall depending from the underside of said top wall at a point remote from said end, the lower end of said last named wall extending toward said interlocking element.

12. A fuel distributing table comprising a horizontal top wall, a lug depending from the underside of said top wall adjacent one end thereof, and a transversely extending arcuate shaped wall depending from the underside of said top wall at a point remote from said end, the lower end of said last named wall extending toward said lug.

13. A fuel distributing table comprising a horizontal top wall, one end thereof being arcuate in shape, a lug depending from the underside of said top wall adjacent said arcuate end, a rib depending from the opposite end of said top wall and skirting the sides thereof, a lip extending outwardly from said arcuate wall, and a transversely extending arcuate shaped wall projecting downwardly from the underside of said top wall from a point intermediate said lug and said rib, the lower end of said wall extending toward said lug.

14. In an interlocked two part fuel distributing system, a blast chamber comprising a wall which is upright in vertical longitudinal cross section, a wall extending rearwardly and upwardly from the upper marginal edge of said upright wall, a table comprising a horizontal top wall extending forwardly from the upright wall of said blast chamber, said upright wall provided with a series of orifices arranged to issue blasts of pressure fluid across the horizontal top wall of said table, a. ledge extending forwardly from the lower marginal edge of said upright wall and underlying said table for restraining downward movement thereof, the contiguous portions of said ledge and the underside of said horizontal top wall each being provided with one element of an interlocking means cooperating to detachably connect said table with said blast chamber, and a wall depending from the underside of said horizontal top wall and partially surrounding said interlocking means.

15. In combination, a boiler firebox with an opening in an upright Wall thereof, a fuel conduit exterior of the firebox delivering to said opening, a blast chamber attached to the underside of the bottom wall of said conduit adjacent its discharge end and extending beyond the conduit into said opening, a separable distributing table extending forward from said blast chamber, a ledge formed with and projecting forwardly from said blast chamber for supporting said table, and means for attaching said chamber to said conduit, said means being applicable from the interior of said conduit and passing through the bottom wall thereof.

16. In combination, a firebox having an aperture in an upright wall thereof, stoker mechanism disposed adjacent said aperture comprising a fuel conduit exterior of the firebox and communicating with said aperture, a blast chamber and a separable distributing table, said blast chamber having a portion within the aperture and a portion extending without the firebox, the latter portion extending under and parallel with the bottom wall of said conduit and a ledge carried by said chamber extending toward said firebox, said table being supported by said ledge, and means for securing said blast chamber to said conduit, said means being applicable from and extending into the conduit passage.

1'7. In combination, a boiler firebox with an opening in an upright wall thereof, a fuel conduit exterior of the firebox delivering to said opening, a, blast chamber attached to the underside of the bottom wall of said conduit adjacent its discharge end and extending beyond the conduit into said opening, a separable distributing table extending forward from said blast chamber, and a ledge formed with and projecting forwardly from said blast chamber for supporting said table.

18. In combination, a boiler firebox having a firing opening in an upright wall thereof, a fuel conduit exterior of the firebox delivering to said firing opening and including a. bottom wall at its discharge end terminating adjacent the firing opening, a blast chamber mounted against the under side of said bottom wall adjacent its discharge end, means accessible from within the conduit detachably securing the blast chamber to said bottom wall, and a separable distributing table at said firing opening extending forward from said blast chamber, the latter being provided with orifices for the discharge of pressure fluid over said table.

JOHN W. MYERS. 

